*{margin: 0;padding: 0;}
 
header .daohang{
  width: 100%;
  position: fixed;
  top: 0;
  z-index: 20;
  background-color: white;
}
.daohang .logo{width: 20%; }
.daohang ul{
  margin-top: 20px;
}
.daohang ul li{margin: 5px 10px;}
.nav-list li a{color: black;font-size: 18px;}
.head-nav{padding-top: 20px;}
.daohang li a:hover{color: rgb(29, 187, 250);text-decoration: none;}
@media (min-width:1024px) {
   .head-nav span{opacity: 0;}
}
@media  (max-width:1024px) {
    /* css选择器和样式列表 */
    .head-nav .nav-list{opacity: 0;width: 33%;}
    .head-nav .logo{width: 33%;}
    .head-nav{height: 66px;}
    .head-nav .logo{margin-top: -20px;}
  }
/* image部分 */
.image{
  margin-right: -30px;
  margin-top: 60px;  
}
/* 小导航部分 */
.xdh ul li a{
  color: black;
}
.xdh .nav2 a{
  color: black;
} 
.xdh .nav2 a:hover{
  text-decoration: none;
  color: rgb(120, 200, 253);
}
.xdh .nav2 a:nth-child(2)::after{
  content: ">";
}
/* 主体部分 */
.zt{
  margin-top: 70px;
}
.zt .row{
  padding: 0 80px;
}
.zt .row p{
  color: rgb(124, 123, 123);
  font-size: 17px;
}
.zt .nav1.row div:nth-child(1){
  padding-top: 50px;
}
.zt .nav2{
  background-color: rgb(240, 240, 240);
}
.zt .nav2 .row div:nth-child(2){
  
  padding-top: 100px;
}
@media (min-width:760px) {
  .zt .nav1 .images img,.zt .nav2 .images img{  
    float: right; 
    width: 50%;
   }
   .zt .nav1 .nr,.zt .nav2 .nr{
    float:left;
    width: 50%;
    
   }
}
@media (max-width:760px){
  
  .zt .nav1 .images img{  
    float: left; 
    width: 100%;
   }
   .zt .nav1 .nr{
    float:left;
    width: 100%;
    
        
   }
   
  }

/* 页尾 */
footer{
  background-color: rgb(219, 234, 250);
}
footer .top a{
  color: rgb(240, 240, 240);
}
footer .top a:hover{
  text-decoration: none;
  color: rgb(83, 206, 255);
}
footer h5{
  font-weight: 600;
  margin-bottom: 30px;
}
footer .foot-list a{
  color: black;
}
footer .ts{
  color: #52dcf5;
  font-size: 28px;
  font-weight: 600;
}
footer .foot-list a:hover{
  text-decoration: none;
  color: rgb(83, 206, 255);
}
.biaoqian{
  background-color: #222;
  color: #fff;  
}
.biaoqian b{
  margin-left: 40%;
}